Question

Perimeter of a square having an area of 25 $c{m}^2$ will be:

• A. 5cm
• B. 10cm
• C. 20cm
• D. 40cm

Answer 1

The correct option is C 20cm

Area of a square is given by Side $\times$ Side
$\Rightarrow$ Side $\times$ Side = 25 $c{m}^2$
$\Rightarrow$ Side = 5 cm

When we look at the factors of 16,
25 = 25 $\times$ 1
25 = 5 $\times$ 5
Since the sides have to be equal, it has to be 5 cm long as 5 $\times$ 5 = 25

$\Rightarrow$ Side = 5 cm
Perimeter of the square = 4 $\times$ 5 cm = 20 cm